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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
Deshaw logo
Deshaw
Medium
Software Engineer Locked

Compare Linux Containers and Virtual Machines

Compare Linux containers and virtual machines through kernels, isolation, resource controls, compatibility, security tradeoffs, and combined deploymen...

Software Engineering FundamentalsContainers & OrchestrationOperating Systems
5
1
68 people solved
Aug 25, 2026
Attentive logo
Attentive
Medium
Software Engineer

Evaluate a Lisp-Style Prefix Expression Language With ADD, MULT and LET Variables

Implement parse(expression), which evaluates an expression in a small Lisp-style language and returns its integer value. Despite its name, the functio...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues
2
0
36 people solved
Sep 24, 2026
Anthropic logo
Anthropic
Medium
Product Manager

Choosing Between Prompting, Retrieval and Fine-Tuning to Specialize an LLM

Starting from a capable general-purpose generative AI model, how would you adapt it so that it does well on work in one specialized domain? `hint Star...

Machine LearningAI Product ManagementFine-Tuning & Alignment Techniques
2
0
19 people solved
Apr 11, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Debug a transformer training pipeline

Debug a Transformer training pipeline You are handed a PyTorch Transformer encoder–decoder training pipeline that misbehaves. The pipeline includes to...

Machine LearningML CodingNeural Networks & Training
79
0
1384 people solved
Jul 31, 2025
Rocket Money logo
Rocket Money
Medium
Product Manager

Root-Causing a Monthly Decline in Subscriber Lifetime Value for Meal Delivery

You are the product manager for a meal delivery business that customers pay for by subscription. Customer lifetime value (LTV) has been falling month ...

Analytics & ExperimentationMetric DiagnosticsSegmentation & Cohort Analysis
1
0
11 people solved
Aug 16, 2026
Amazon logo
AmazonGoogleCitadel
Medium
Software Engineer

Longest Subarray with Every Value Occurring at Most k Times

Longest Subarray with Every Value Occurring at Most k Times You are given an integer array nums and an integer k. A subarray is good if every value in...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
0
0
7 people solved
Waymo logo
Waymo
Medium
Software Engineer Locked

Character at a Position in a Run-Length Encoded String Without Decoding

Given a run-length encoded string such as B1A2E3C1, return the character at each queried position of the decoded sequence without decoding it. Runs ca...

Coding & AlgorithmsBinary SearchArrays & Strings
7
0
56 people solved
Sep 10, 2026
Citadel logo
Citadel
Medium
Software Engineer

Compute max team size with a core interval

You are given n employees’ working-time intervals, where employee i works during the inclusive interval [startTime[i], endTime[i]]. You want to form a...

Coding & AlgorithmsIntervals & SchedulingMath & Number Theory
28
0
361 people solved
Dec 25, 2025
Quince logo
Quince
Medium
Software Engineer Locked

Open the Minimum Number of Sprinklers to Cover a Garden

Find the minimum sprinklers whose clipped intervals continuously cover an entire garden by retaining farthest reach per left endpoint and making greed...

Coding & AlgorithmsIntervals & SchedulingGreedy
5
1
40 people solved
Aug 11, 2026
Bnsf logo
Bnsf
Medium
Software Engineer

Implement CRUD API and tests

You are given two software-engineering tasks. 1. Implement a simple REST API for a resource such as Note or Message. - Support basic CRUD operation...

Software Engineering FundamentalsAPI DesignTesting & Quality
37
0
325 people solved
Jan 15, 2026
DoorDash logo
DoorDash
Easy
Data ScientistSenior+ Locked

Find Monthly Top Customers Excluding High-Frequency Users

A PostgreSQL interview problem about ranking monthly customers while excluding users who meet a high-frequency threshold. Candidates must build the el...

Data Manipulation (SQL/Python)SQL
7
0
74 people solved
Jul 27, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Design a referral leaderboard with chain-based counts

Design and implement a function that generates a referral leaderboard for a platform, given two equal-length arrays rh_users and new_users representin...

Coding & AlgorithmsTrees
51
0
587 people solved
Aug 12, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Find List Entries That Are Anagrams of a Target

Return list entries that are exact anagrams of a lowercase target by comparing character counts, preserving input order and duplicate matches while re...

Coding & Algorithms
10
0
73 people solved
Aug 15, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Minimize Fuel Cost Across Cities

Find the minimum fuel-purchase cost for traveling through a weighted city network with different local prices and unlimited carrying capacity. The alg...

Coding & AlgorithmsGraphsGreedy
18
0
264 people solved
Aug 3, 2026
IBM logo
IBMMetaMathWorks
Easy
Software Engineer

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking You are given a string s containing only lowercase English letters. One operation rep...

Coding & AlgorithmsTwo Pointers & Sliding WindowGreedy
0
0
8 people solved
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Explain AI Tool Use, Model Selection, and Engineering Validation

Explain practical AI use across coding and summaries, with honest contribution measures, task-specific model choices, validation, and cost awareness.

Behavioral & LeadershipAI-Assisted DevelopmentLLM Applications
8
0
65 people solved
Sep 5, 2026
Wayfair logo
Wayfair
Medium
Product Manager

Wayfair: Finding Hidden B2B Buyers, Spotting Designers and Choosing Outreach Targets

Wayfair sells home furnishings both to consumers and to business buyers, but many businesses shop through ordinary accounts, so there is no simple way...

Analytics & ExperimentationSegmentation & Cohort AnalysisExperiment Analysis & Readout
0
0
11 people solved
Aug 17, 2026
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Implement a Time-Based Key-Value Store

Implement a time-indexed key-value store that sets values at timestamps and retrieves the most recent value at or before a query timestamp.

Coding & Algorithms
2
0
28 people solved
Aug 14, 2026
Rippling logo
Rippling
Hard
Software Engineer

Design a user behavior tracking system

Problem Design a User Behavior Tracking System that collects and analyzes user events from mobile and web applications across multiple products. The s...

System DesignSystem Design FundamentalsData Ingestion & CDC
144
0
974 people solved
Feb 11, 2026
Roblox logo
Roblox
Medium
Frontend Engineer Locked

Design a Reusable Dropdown Menu Component

This question assesses a candidate's ability to design a reusable, production-grade UI component, covering public API design, controlled versus uncont...

System Design
18
0
125 people solved
Jun 9, 2026
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